S01:E11 - Episode 11
S01:É01 - S01:E01 - Episode 1
Hae-young finds an old walkie-talkie in the corner and gets clues on the unsolved kidnapping case.
S01:É02 - S01:E02 - Episode 2
Hae-young joins the unfinished case squad and Jae-han says something through the walkie-talkie.
S01:É03 - S01:E03 - Episode 3
Hae-young is confused after discovering that the talks through the walkie-talkie changed the past.
S01:É04 - S01:E04 - Episode 4
The squad starts investigating the Gyeonggi Nambu case despite the opposition from their superiors.
S01:É05 - S01:E05 - Episode 5
Hae-young gets one step closer to the truth of the disappearance of Jae-han.
S01:É06 - S01:E06 - Episode 6
Hae-young continues to make an effort to change the wrongly intertwined past and future.
S01:É07 - S01:E07 - Episode 7
After Su-hyeon dies, Hae-young contemplates whether he should keep the walkie-talkie.
S01:É08 - S01:E08 - Episode 8
After checking the fingerprint of Da-hye, the squad tracks down the whereabouts of her.
S01:É09 - S01:E09 - Episode 9
Hae-young suspects Chi-soo who might have something to do with the disappearance of Jae-han.
S01:É10 - S01:E10 - Episode 10
Through a walkie-talkie, Jae-han realizes that Su-hyeon and Hae-young are on the same team.
S01:É11 - S01:E11 - Episode 11
Jae-han heads to In-ju to investigate the In-ju female student sexual assault case.
S01:É12 - S01:E12 - Episode 12
Su-hyeon falls in great shock after finding out that Chi-soo killed Jae-han.
S01:É13 - S01:E13 - Episode 13
Jae-han heads to In-ju and finds out that Hae-young is Seon-woo's younger brother.
S01:É14 - S01:E14 - Episode 14
Hae-young heads to In-ju and interrogates the person who pointed at his brother as the main culprit.
S01:É15 - S01:E15 - Episode 15
With Seon-woo's death coming close, Jae-han hurries to In-ju to save Hae-young's brother.
S01:É16 - S01:E16 - Episode 16
Hae-young does not lose hope of saving Jae-han and immediately grabs the walkie-talkie.
